Roller delayed...lever actuated...call it what you will these guns are the cats pajamas! __________________________________ @zenithfirearms @dragogear @aimpointusa @hkparts __________________________________ #556 #rollerlock #leveractuated #rifle #zenithfirearms #hkparts #firearmstraining #guns #gunsofinstagram #canon #firearmsphotography #photography #gunlifemedia #recomactual